Car truck



B. W. KADEL.

CAR TRUCK.

APPLICATION FILED 1AN.22. 1921. RENEWED MAR. l?. i922.

Patented May- 2,1922.

n 6 3 U muv wm... .xy MTA. au w .13 1 0 J 0 BYERS W. KABEL, OF BALTIMORE, MARYLAND, ASSIGNOR TO THE T. H. SYMINGTON COMPANY, OF NEW YORK, N. Y., A CORPORATEON 0F DELAWARE.

can racen.

Patented May 2, 1922.

Application filed january 22, 1921, Serial No. 439,097. Renewed March 17, 1922. Serial No. 544,684.

To @ZZ whom t may concern.'

Be it known that l, BYERs W. yKADEL, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful improvements in Car Trucks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

rlhe invention relates to car trucks, and more particularly to trucks of the lexible type, which involve spaced side Jframe members normally maintained in square relation by gravity acting means which resists relative longitudinal displacement of either side frame member and is adapted to return the parts to normal position after a displacement thereof due to the truck pass` ing around curves or over bad rail joints or defective switch points.

The principal object of my invention, broadly stated, is to aord simple, strong, eiiicient and reliable means for maintaining the side frames in normal or square relation and for resisting relative longitudinal movement of either side :trame from normal position. To this end the principal feature of the invention by which this object is accomplished consists in interposing between two relatively movable parts of the car truck means whereby a longitudinal displacement of either side frame from normal position causes a vertical separation of the said parts, said vertical separation being resisted by the weight imposed by the car body on the car truck. The means for resisting relative longitudinal displacement oi the side frames from normal not only performs that function but also serves to restore the parts to their square relation.

There are other features of the invention residing in the various elements and combinations of elements as hereinafter" will kapear.

p In the drawings which illustrate the preferred embodiment ot the invention, the scope whereof is pointed out in the appended claims,-

Figure l is a view, partly in plan and partly in horizontal section, of a car truck embodying the invention, the truck bolster, which may be of the type commonly employed in trucks oi this character, being `Figure 2 is a fragmentary side elevation ot the central portion of a car truck showing the relation of the truck squaring mechamsm to the side `frame and cross connecting member of the truck. i

Figure 3 is a plan View, partly in horizontal section, of the construction shown in Fig. 2, the bolster springs being omitted. Ip Figure 4 is a section on the line 4--4 of Wig.

Figure 5 is a detail sectional view on the curved section line 5--5 of Fig. 3.

In the'drawings, l indicates spaced side frame members which are capable of relative movement longitudinally of the truck. Each ofthe side frames is furnished at its opposite ends with journal boxes 2 receiving the journal ends of axle 3 upon which the truck wheels l are mounted.

The side iframe members 1 are movably connected by a cross connecting means 5 which may advantageously be a spring plank member whose opposite ends extend into the bolster openings 6 of the respective side trames between the columns 7 o the latter. The vspring plank 5 is suiiiciently spaced from the truck columns 7 to allow it to turn freely without binding upon the said columns when the side frames l execute an extended displacement longitudinally of the truck from normal position. rIhe bolster 8 which bears upon springs 9 resting upon the spring plank is likewise spaced from the columns 7 of the side 'frames a suitable distance, 'as indicated at l0, to allow the bolster freely to change its angular position in accordance with longitudinal displacements of the frame members l.

The gravity actuated means tending to maintain the side frame members in normal relation and operating to restore them to normal after they have been shifted out of square, preferably comprise vertically separable bearing members ll and l2, respectively, between which roller devices 13 are interposed. Each of the bearing members 11 and 12 is provided with a plurality of recesses 14, the said recesses being arranged in circularly curved relation and each being it'ormed with oppositely inclined bearing taces 15 with which the respective rollers 13 are adapted to engage. instead ot employing balls or cylindrical rollers itis, as shown, preterred to employ roller devices 13 formed as truncated cones. The bearing members 11 and 12 and the interposed rollers 13 operating upon the inclined taces 15 of the tormer constitute a cam mechanism by which relative rotation ot the bearing members 11 and 12 eects a vertical movement ot the upper member 12 withrespect to the lower member 11.

r1`he lower bearing member 11 of each cam mechanism is rigidly mounted upon a corresponding one of the side trame members. .For this purpose it may be provided on its under side with a centrally extending recess 16 which is adapted to receive the portion ot the cooperating side trame 1. which extends between the columns at the lower end ot the latter. l rllhe upper bea 'ing member 12 of, the cam mechanism is made rigid with the spring plank 5, its connection with the latter preferably being etllected by providing` it with lugs 17 which closely embrace the neighboring end portion of the spring plank. rll`he spring plank 5 may be movably connected at its opposite ends to the respective side frames 1 by means of pivot pins 18 which project through corresponding pivot openings 19 and 2O in the side 'trames and spring plank, respectively, and which pass through suitable apertures at the centers oi the bearing members 11 and 12.

`When the side frame members l are displaced longitudinally o'f the truck Ytrom normal relation as occurs, tor example, when the truck passes around a curve, the spring plank or means connecting the side trames across the truck changes its angular relation with repect to the side trames. This angular movement ot the spring plank 5 causes the upper bearing members 12 of the cam devices to rotate with respect to the corresponding bearing members 11 mounted upon the side frames, and through the cooperation ot' the rollers 13 with the inclined faces 15 the bearing members 11 and 12 ot the cam devices are caused to separate. lThe upward vertical movement ot the upper bearing members 12 thereby raises the spring plank 5. The elevation ot the spring plank 5 is, ot course, opposed by the load ot the car which is transmitted thereto from the truck bolster 3 through the springs 9. `When the external torce causing the out ot square displacement of the side trames 1 ceases to act the load ot1 the car body forces the upper bearing members 12 oi" the cam devices downwardly toward their companion bearing members and, because ot the cooperation of the rollers 13 and the inclines 15, the bearing members 11 andy 12 are caused to rotate with respect to each other toward normal position, thus enforcing corresponding relative movements imanes or the side trames 1 and the spring plank 5 to thereby restore the parts to normal po sition.

As is shown in the drawings, it is preferred to employ a plurality of gravity actuated means tor opposing displacement ot the truck parts trom normal relation, but it will be apparent that a single gravity actuated means may be employed to effect that result, since the restoration of the spring plank 5 to normal relation with either ot the trame members 1 necessarily results in bringing the side frames in square relation.

My invention has the advantage ot rendering the resistance to longitudinal displacement ot the truck frames from normal position, as well as the torce promoting restoration ot the parts to square relation, proportional to the weight ot the car and its lading. rllhus, the greater the weight of the car and its lading the greater is the opposition offered to the truck getting out of square and the greater is the torce applied ttor returning the truck parts to normal position. As will be understood, the pressure ot' the wheels upon the vrails varies with the load upon the truck and consequently the external forces applied to the sideframes 1 and tending to throw them out ot square when the truck is passing around a curve,

are proportionately increased. By employing the weight ot the car as the torce for resisting the displacement ot the side frames 1 lrom normal or square relation, 1 provide in eliect a self-compensating means for controlling the movements ot the side frames.

l claim 1. 1n a car truck, the combination with side trame members which are relatively movable longitudinallyr et the truck, ot means Jr'or movably connecting said sideV frame members, and means whereby the load upon said truck operates to restore said side trame members to normal position alter they have been displaced :from such position by a relative movement longitudinally ot' the truck.

2. ln a car truck, the combination with side trame members which are relatively movable longitudinally otl the truck, ot' means for movably connecting said side trame members, and gravity actuated means constantly tending to maintain said side trame members in normal relation. n

3. ln a car truck, the combination with side trame members which are relatively movable longitudinally ot the truck, ot means tor movably connecting said side frame members, and gravity actuated means opposing relative longitudinal displacement ot said side trame members trom square position and promoting relative longitudinal displacement ot said side trame members toward square position.

ll. ln a car truck, the combination with side frame members which are relatively movable longitudinally oi' the truck, or means for movably connecting said side frame members, and gravity actuated means for opposing relative longitudinal displacement of said side frame members away :from normal.

5. In a car truck, the combination with side :trame members which are relatively movable longitudinally of the truck, of means for movably connecting said side frame members, and gravity actuated means for controlling relative longitudinal movement of said side iframe members.

6. In a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, or' means for movably connecting said side trame members, and gravity actuated means adapted to apply force to at leastone oi said side frame members tending to move said frame member toward normal position after a longitudinal displacement thereof away from normal.

7. In a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, of means whereby upon a relative longitudinal displacement of said side frame members 'from normal position the load on said truck tends to cause relative longitudinal displacement of said side frame members in the opposite direction.

8. In a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, of gravity actuated means for controlling relative longitudinal displacement ot said side frame members.

9. In a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, of means for movably connecting said side frame members, and means interposed between at least one of said trame members and said connecting means adapted to move said connecting means upwardly upon the relative longitudinal displacement of said side iframe members away from normal.

10. In a car truck, the combination with side trame members which are relatively movable longitudinally of the truck, of a spring plank connecting said frame members and pivotally movable with respect to each, and kmeans operable upon relative longitudinal displacement of said side frame members away from normal position for raising said spring plank.

11. In a car truck, the combination with side 'Frame members which are relatively movable longitudinally of the truck, of means for opposing relative longitudinal displacement of said side frame members away -l'rom normal position, said means being adapted to cause relative movement of said side irame members toward normal position and including roller devices and means affording inclined bearings for said roller devices. y

12. Inv a car truck, the combination with side trame members which are relatively movable longitudinally olf the truck, of a spring plank pivotally connecting said side lrame members, and cam mechanism operatively interposed between said spring plank and at least one of said side frame members adapted to cause relative vertical movement oli said spring plank and side frame upon a pivotal movement of said spring plank with respect to said side frame.

13. In a car truck, the combination with side trame members which are relatively movable longitudinally of the truck, of a spring plank movably connecting said side trame members, and cam means interposed between said spring plank and at least one or' said side frame members, said cam means including a plurality of cone rollers and curved inclined bearings for said rollers.

14;.In a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, of means vfor movably connecting said frame members, and means operable upon a relative longitudinal displacement of said side trame members away from normal position for exerting force upon at least one of said frame members away from normal position members toward normal position, said last named means including a vertically extending spring.

15. In a car truck, the combination with side frame members which are relatively movable longitudinally oi the truck, of means for resisting relative longitudinal displacement oi' said side trame members away 'from normal position, said means including a member which is adapted to be moved upwardly by said displacement of said side frame members and means for resisting upward movement of said last named member.

16. In a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, of means for resisting relative longitudinal clisplacement oi. said side frame members away from normal position, said means including a member which is movable vertically upon said displacement of said side frame members and vertically compressible spring means acting upon. said vertically movable member.

17. In a car truck, the combination with side frame members which are relatively movable longitudinally of the truck, of a spring plank pivotally connected at its opposite ends to said frame members, and cam devices interposed between said spring plank and each ot said frame members adapted to convert a longitudinal displacement of llO Lampen either side frame membe "from normal posi- Lion infilo a vertical movement of said spring plank, and means for resisting the vertical movement of said spring plank.

18. ln a car truck, the combination with side frame members which are relatively mov able longitudinally of 'elle truck, of means Connecting said eide frame membei's, and

means for resisting a longitudinal displacement of either side frame member from no1-mal position, said lt named means invinding cam devices adapted to be actuated by said movement of either fname member from noi'mal position.

En "eestimony whereof l a'fiX my signature.

BYERS W. KADEL. 

